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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION(r187013): cannot open tddbin.com anymore &quot;quit unexpectedly&quot;"
   href="https://bugs.webkit.org/show_bug.cgi?id=147102">147102</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>REGRESSION(r187013): cannot open tddbin.com anymore &quot;quit unexpectedly&quot;
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>528+ (Nightly build)
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>JavaScriptCore
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>tobi+webkit&#64;basecode.de
          </td>
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        <pre>Created <span class=""><a href="attachment.cgi?id=257080" name="attach_257080" title="Crash Report">attachment 257080</a> <a href="attachment.cgi?id=257080&amp;action=edit" title="Crash Report">[details]</a></span>
Crash Report

r187013: &quot;quit unexpectedly - A problem repeatedly occurred with tddbin.com&quot;
r187008: works

I would suspect <a href="https://trac.webkit.org/changeset/187012">https://trac.webkit.org/changeset/187012</a> being the cause because it's a heavy change.
tddbin.com is a &quot;no-install/setup testing environment&quot; from uxebu and it makes use of block scoping, const and let.
Another interesting page in that regard is <a href="http://tddbin.com/#?kata=es6/language/block-scoping/const">http://tddbin.com/#?kata=es6/language/block-scoping/const</a>. It offers several use cases to test block-scoping.</pre>
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